Apparatus for dying molds.



J. E. MATHBWSON.

APPARATUS FOR DRYING MOLDS.

APPLIOATION FILED Mum, 190a.

903,391. V Patented Nov. 10, 1908.

- WITENESSES: y ,5 INVENTOR fi A TTORNEY.

was uqmus PETERS cm, wnsmrvcram u a n rr s JEREMIAH E. MATHEWSON, OFBROADHEATH, ENGLAND, ASSIGNOR TO BENJAMIN O. TILGHMAN, JR, AND RICHARDTILGHMAN, OF PHILADELPHIA, PENNSYLVANIA.

APPARATUS FOR DRYING MOLDS.

Specification of Letters Patent.

Application filed March 1, 1906.

To all whom it may concern:

Be it known that I, JEREMIAH EUGENE MATHEWSON, a subject of the King ofGreat Britain and Ireland, residing in Broadheath, in the county ofChester, in the Kingdom of Great Britain, have invented a certain newand useful Improvement in Apparatus for Drying Molds, (for which I haveobtained British Letters Patent No. 4,656 of 6th March, 1905,) and ofwhich the following is a true and exact description, reference being hadto the accompanying drawings, which form a part thereof.

M invention relates to the drying of molds and as for its object toprovide suitable apparatus for passing air downwardly through a fire andif necessary to cool down or reduce the tem erature of the hot gases soproduced before t ey enter the mold.

With this object in view my invention consists in the details ofconstruction and manner of operation set forth in the followingdescription and accompanying drawing in which like reference charactersrefer to corresponding parts.

In the drawing, A, is the body ortion of a cylindrical casing or outershel supported upon the flat ring P by the legs B, B. The removable lidor top J, is hinged at f to the upper end of the casing and has anopening in the center thereof. Projecting upward from this opening is aconduit K, which is turned into an elbow 0 en to the atmosphere.Projecting downwardfy through the top of this elbow is the nozzle L, thesaid nozzle being connected up to a suitable apparatus (not shown) forstoring or generating compressed air. Within the casing opposite theopening in the lid or plate is a baflfle plate M, supported by armsfastened to the interior of the casing. Below said baffle plate is afire box corn risin a cylindrical metallic shell f, whic shell containsa magazine F, composed of ganister, fire brick, or other refractorymaterial. Below this magazine is supported a hearth G, leaving anannular space between the lower end of the wall of the magazine, and theeripheral portion of the upper surface of tile hearth. Between thecylindrical shell f, and the casing A, is an annular space over the topof which extends the outwardly turned annular perforated flange H.Attached to the flange H, between any two of its perforations is a luga, into which is screwed the handle 71. This handle extends through ahorizontal slot in the casing, and attached to the said handle is aplate6, over lap ing the edges of the slot on the interior of t e casing forthe urpose of keeping the slot closed when the fiandle is moved. Theannular perforated flange H of the shell rests upon another erforatedannular flange N. The flange N, is bolted to the casing A, and supportsthe magazine F, together with its metallic shell f, by means of theoutwardly turned flange H of the latter; thus forming a register whichmay be opened or closed to the passage of air therethrough. Around theannular opening between the lower edge of the magazine wall and theoutward periphery of the hearth, is a cylindrical ring Q. The said ringextends above and below the said opening, and is supported by the arms6, e,'connecting the hearth Gr with casing A. The said ring is held in aposition about mid way between the shell of the magazine and the outercasing by the radial pins g, 9.

From an outlet in the bottom of the casing projects the pipe R whichenters a flanged tube E, placed over the opening into the mold. The saidpipe is shown projecting upwardly into the bottom of the casing A, thusforming a wall around the outlet to revent ashes that may haveaccumulate in the bottom of the casing from passing through the outlet.It is not necessary, however, that the said wall should be formed byprojecting the pipe B into the casing, as the said wall may be formed searately from said pipe and arranged aroun the outlet in any othermanner, provided it prevents the ashes from entering the outlet. Thearrangement of this tube or wall around the outlet, or so that theoutlet will be within it, forms, together with the outer casing A, anash chamber at the lower end of the casing. The entire a paratusincluding the flanged tube E, may be moved from one mold to another bythe handles C, C, thusit has all the advantages of a portable structure.A door D is attached to the lower part of the casing which may be openedto obtain access to the lower end thereof when it is necessary to removethe ashes.

By turning on the cock 0, in the compressed air connection the said airissues in the form of a jet through the nozzle L, into the conduit K,thus forming, together with pass through the register opening around thesaid conduit, an injector for the drawing in of rings H and N, the twostreams entering together from the annular space into the chamber belowwhere they have time to mix completely before use. The hot gases arethus toned-down to the temperature required for drying purposes. Thetemperature of the mixture maybe re ulated by varying the proportion ofthe voIume of air permitted to top of the annular space, which may beentirely closed if necessary. The baflie plate M above the fire boxeffects a more perfect distribution of air before its division into therelatively hot and cold streams when the re isterH is open, and thecylindrical ba e ring Q directs the production of combustion into thechamber below the hearth. Fuel may be introduced into the magazine F, atthe top thereof by 0 ening the top of lid J.

The herein descri ed apparatus is characterized, among other things, bythe passing of the air downwardly through the fire'by virtue of which Iobtain a heated element free from carbon and smoke because any carcarryoff more or less quantities of carbon and smoke. These products, due tothe ressure of air, create combustion and burn in the pipe leading tothe mold. Theregulation of the temperature of the heated drying elementbeing impossible under these conditions the o eration results in causinginjury to the mo d unless great care is used. The need for a largeconnecting pipe from a blower is obviated in the present appara tusbecause the (qiuantity of compressed air necessary to pro uce the blastis comparatively small and thus can be delivered to the apparatus by alight flexible tube of small diameter and of any length. The connectionof this tube with the a paratus may be made by means of any simpleappliance with great facility and at the upper part, where it will beout of the way of the workmen. My apparatus will thus be available foruse over a much larger area than the ordinary apparatus besides beingmuch simpler in construction, much lighter and easier to operate.

While thedevice above described is portable, economical and eficient inits operation, I do not wish to confine myself to tl e V exact detailsthereof as the same may be materially modified and only illustrates oneform of carrying out my invention.

Having now described myinvention what I desire to claim and securebyLettersPatent is 1. Anapparatus for drying molds consisting of a firecontaining chamber, means for passing air downwardly throughsaidchamher. and means for directing the gaseous products of combustioninto a mold. p 2. An apparatus for drying molds, consisting of a firecontaining chamber, means for passing air downwardly through said cham.

ber and the air from the assage, and a conduit for directing the resuting mixture into a mold. p *1 v 4; In an apparatus for drying molds, acas ing, a fire containing chamber within said downwardly direction, thesaid casing having an air inlet at its upperend and an air outlet at itslower end, means for passing air through said casing both through andaround volume of air passing around said fire box.

5. In an apparatus for drying molds a casing having an air inlet at itsupper end and an air outlet at its lower'end, a fire box located withinsaid casing, means for passing an downwardly through said casing boththrough and around said fire box and abafiie plate interposed betweenthe openingin the upper end of the casing and the-upper end of the firebox.

6. In an apparatus for drying molds, a as ing having an open endedconduit projecting from its upper end, an air outlet at its lower end, afire box through which air may be passed Within said casing, an outsidepassage for air between said fire box and the interior of said casing, abaffle plate interposed be tween the mouth of said conduit and the firebox, a compressed'air nozzle directed downwardly near the open end ofsaid conduit and means for varying the area of the entrance of saidoutside passage. V v

7. In an apparatus for drying molds, a cas ing having an air inlet atits upper end and an 100 casing through which air may be passed in a 105said fire box and means for regulating the i r air outlet at its lowerend, a fire box located within said casing and having a lateral 0peningaround its lower end, a baffle plate interposed between said opening andthe said casing and means for passing air downwardly through saidcasing, both through and around said fire box.

8. In an apparatus for drying molds, a casing having an air inlet at itsupper end and an air outlet at its lower end, an inwardly projectingwall surrounding the outlet to form in the bottom of the casing anannular ash chamber, a fire box located within the casing and means forpassing air downwardly through said casing, both through and around saidfire box.

9. An apparatus for drying molds, comprising a portable casing, a topfed, solid fuel furnace contained therein, means for passing air intosaid casing above said furnace, and a conduit leading from beneath thefurnace for directing the products of combustion into the mold to bedried.

JEREMIAH E. MATI-IEWSON.

Witnesses D. STEWART, ARNOLD KATZ,

